Combined type-writing and computing machine.



F. F. MAIN.v

COMBINED TYPE wmme AND COMPUTING MACHINE.

APPLlCATiUN FILED AUGJ. KSU.

.Patented Nov. 20, 1917.

3 SHEETS-SHEET l.

F. F. MAIN. commen TYPE wRmNG Ann comruma MAcmNs. APYLICATIDN HLEU AUG.26,191I.

Patented Nov. 20, 1917.

3 SHEETS-SHEET 2.

F. f. MAIN. COMBINU) TYPE`WRITING AND COMPUTING MACHINE. APPucArxon msu maize. lsu. 1,247,304, rmnmd N0v.20,1917.

3 SHEETS-SHEET ai To all whom it may conoewz.:

'NITED sTATEs PATENT OFFICE.

` FRED F. MAIN, or CHICAGO, ILLINOIS, AssIGNon, BY MESNE ASSIGNMENTS, To UNDEBJ- Woon COMPUTING MACHINE COMPANY, or NEW YORK, N. Y., n CORPORATION or NEW YORK.

Be it known that I, Fnsi) F. MAIN, a citizen of the United lStates, residing in Chica o, in the county of Cook and State of Illinois, have inventedcertain new and iis'eful Irr'i rovements in CcmbinedType-Writ in` an Computing Machines, of which the fo owingisa specification.

This invention relates generally 4to that class of combined typewritng and adding machines in which computin devices are set up by the numeral keys of t e typewriter,

and subsequently rotation is effected' of the computing wheels, each-.to an extent deter mined by the setting of the computing de yicesby thefnumeral keys, thus registering 4 the numbers 'bn the computing Wheels. The

carriage of the typewriter is connected to thel computing mechanism in a manner to determine thegdenomination of the Comput-1 device .which is set by any key. A'machine of this general description is illus-4 trated in pending application No. 466,836,

led December 1,0, 1908; in vmyfPatent No.

1,157,884 dated 'October 26, 1915, and in the patents toV J. Frank Allard,'No-. 1,178,438, dated April 4, 1916` and Frederick A. Hart, No.`1,190 ,233, dated-July 4, 1916, onwhich this application is an improvement. 30

One of the principal obyects o f the present invention is to provide simple and efficient means for .causing the general computing o erator tb be actuated automatically, u onV e"'writing of any figure in the units p ace 1n a column, or in other words, upon the 'setting -up of a computing device in the units place in the computing mechanism.

In inyco-pendiiig application patented October 26, 1915, No. 1,157,884, I' have proyided automatic means of a pneumatic type for actuating the operator of the computing .mechanism tocoinpute' automatically iit the end 'of a. number, thus obviatng the chance of the operative forgetting to actuate the 0 erator for this purpose. In this application I have illustrated electrical means for -actuating theoperator and I control the `Same in' the same manner as in my above mentionedpatent. That is to say I depend 0n the con]iincti\'e action of the typewriting 'o'r im rintin meclianisni.tlie czii'riaffe by its A l? e position, and the coinpiiting niei'zininisin', to control the drive oi' actuation of the operator.

Speclcatlon of Letters Patent.

Application tiled August 26, 1911. Serial No. 646,133.

' the Computing device to he ySet by the next Patented Nov. 20, 1917.

In the preferred form of the invention,

forth in pending applicationNo.' 596,451,

-fled.-December 9, 1910; and this motor,

The clutch is normally open. p

Preferablyhe clutch tends .normally to closle, but it rvided with a restraining 7l -release saidji'estraining device,.I preferablyl device whichho ds it open; and' in order. to

rovi'de -a. power-driven releaser, which,- owever, is normall disconnected from said restraining device, ut at the operation of the typewriting machine at the'4 aired stointhis aitoinaticall to' said reraim evice to re ease it an permit the c lutchntrgrclose. A -A connection extends from thie key-cora trolled mechanism of .the typewritngfma chineto said' clutch, to effect the 'closing of thesame automatically. at the desiredpoint in the line ofjwriting, which point is Vwhen the last figure in a number, that is the one in the units column has been Struckf. Upon the, carriage of the typewriter, 'there is mounted a wiper, cam or tappet, which at each steo of the carria'gg-whenever compu.-l

tation is begun, operates one of a. s etof jacks whereby is determined the denomination o depression of a typewriter key. ponentis provided which .is normally. out. off-coperative relation with' the .universal bnr actuated by all of the typewriting keys and especially the numeral keys, but adapted to be brought into coperative relation with seid univeisal bar jwhen a numeral key is struc-.lc at a time'corresponding to the ilnprinting. of a character in the units column.

carriage according,r to the position thereof fhroiigh the actuation of the computing jack I employ a constantly running motor as .Het 58 dutch u Said 'ns'tntly- @wenn ius.4

ipo

10.5 The..nterponent-may be controlled lby the corresponding to the units column by the tappet on the carriage.

In the accompanying drawing,

Figure lis a side elevation partly in section of an Underwood typewriter combined with aA coinputing machine of the Hanson` type, and showing the present improvements applied thereto, the-par`ts being in normal positions and certain devices'omitted for the .Sake of clearness.'

Figs. 2 and 3 are fragmentary views of portions of the mechanisintaken in side elevati'on similar to F ig. 1, but showing the mechanism ,in its actuated position with theJY Fig. 5 is,/a fragmentary sectional view inA side elevation, parts being broken away along different lines from that shown in Fig. 1 to disclose elements concealed in Fig. 1.

A continuously running electric or other Vmotor 1f' 1s provided with a main shaft 2,

the latter connected to a shaft-3 by means of a safety friction clutch. 'This clutch may comprise a disk 5 having a hub 4 keyed to the shaft 2, a friction disk v6 being loose on said hub; another friction disk 7 being confined between disks 5 and 6. Ani arm 8 fast on shaft 3 isl bent over at 9 to be engaged and driven' by a lug lO'on disk 6. A compression spring 11 is coiled around the hub .4, and adjusted by a nut 12 to determine how much of a load the cl'utch will carry without slipping. v

Arack V13, forming part of a rack frame,

is movable forwardly and backwardly in the'bas'e of the 'adding machine, and performs "the final portion of the computing operation. This rack frame 1s reciprocated intermittently 'by the constantly rotating shaft 3, by means of a clutch mechanism; said rack frame being connected to a crank "shaft to be driven thereby, and the crank shaftv being-connected-b'y a worm gearing to. said shaft 3, as will presently be set forth.

Upon the rack frame'is secured a yoke or carrier 14, in engagement with which is the "upper end of an arm 15, provided on a cross head 16, which moves forwardly and'backwardly, or from leftto right and return at l Fig. 5, so'as to reciprocate said rack frame 13; said clOSS head being carried on a hori- A zontal slide 17, which worksin bearings l18 on a casing 19. This'slideis reciprocated by means of a Crank 23, fixed on a horizontal shaft '24;2said crank carrying a slide block i 26, working in a groove 27 in the cross head.

Loose oir shaft 24 is a worm gear 30, meshing with a Worm 31, the latter fixed on shaft' -pin or la.`

3, sothat the worm wheel 30 is constantly rotating.

The worm wheel 30 is connectible to shaft 24 to turn the same whenever it is necessary to reciprocate the rack frame 13 to complete a computing operation; and at the conclusion of said reci rocation, said worm wheel 30 is automatica disconnected from 'the shaft 24,- and the latter comes to a stop, while the motor 1 continues to rotate.

.Fixed to shaft 24 is a cup member 32 of a clutch; and fixed to' `the hub of worm gear 30 is a collar 33. Running on this collar and adapted to engage the cylindrical inner face of the clutch cu 32, is a grippingball or roll 34'; said roll) occupying a pocket 35` in the clutch cup, and rolling on an inclined Hoor 35'* thereof, so that relative movement of the clutch cup and collar 33 in one direction' willcause said members to-be clutched together by the roll, while relative movement in the' opposite' direction will produce the opposite effect, so as to permit independent rotation of the r 30. a.

The clutch ro l is shiftable between gripping and releasing positions in the pocket 35 by means of an annular disk-or rig 36 which rides loosely Aon the collar 33 withi. cup v32 and which'is cutaway at one place to receive thelroll 34, so as to engage the rolll ,95

on both sides thereof. Rotation of disk 36, therefore, shifts the roll. Against said disk 36 bears one -end of a compression sprin 38,. which is .confined within a pocket 3 formed in 'said disk; the other end of said spring bearing againsta stop 39 secured to ing collar. to cause shaft 24 to rotate, with gear 30. In other words, said spring .tends normally to close; ,the clutch. Normally, howeveig/ saidV disk 36 is restrained from causing the roll to bind; or in other words, I

with .the roll 34 in a direction to y saiddiskisnormally h eld jn clutch-releas- Y ing position.

For this urpOSe, there is provided atrip with a lug 41 36, 4said'lug,projecting through an opening in the clutch cup. When shaft 24 is to be clutched. to the gear 30, the latch 40 is raised to release lug 41, whereupon spring 38 throws disk 36, together with roll 34thusV locking the clutch cup and' the shaft 24 to the rotating worm gear 30. The pin 40 is automatically dropped again into. the

path of lug 41, so that at the completion of a singlerotation of the Ashaft 24, thei'latter is av ain unclutched from the worm 'gear 30.

T o rack frame 13 is caused to`recipro-- cate after the numeral keys4 of the type- 'iis 40, normally in engagement 1 provided upon releasingv disk part of the operator, still I will first dc-v scribe means whereby the operator may de-V press a special keyto operate'said clutch, and cause the reciproeation of the rack frame; this mechanism being substantially shown in said application No. 596,451. Said key is designated as 42, and is mounted on a stem 43, pivoted at itslower end to a lever 44, fulcrumed at 45 upon the machine frame.

Said lever 44, in turn, de resses a cross -lever 46, which is pivoted at 4 to the lframework, and at its other end engages a notcli 48 formed in the top of the trip pin or latch 40, so as to cause or control the upand down movement f said latch, whereby the clutch is caused to close and open. The lever 46 is provided with an adjustable end or arm 50,. upon which the key lever 44 bears; this part 50 being adjustable by screws 52, thereby securin accuracy of adj ustmentand movement of the clutch-controlling mechanism. y

Depression of the key 42 carries down the .lever 44, the latter rocks the lever 46 about its fulcrum 47, the other end of the lever lifting the latch 40 away from the clutch lug 41. The operator immediately releases the key 42, which isreturned to normal position by a spring 54. The movement of the key is limited by a pin within a slot 56 in the key stem. The lever 46 has a returning spring 57.

The typewriter includes'the usual set of type-operating keys, including alphabet keys and also including',r numeral keys 88 mounted on lever 88* and connected by bell cranks 89 to type bars 90, whichl are thrown'4 back against a platen 91 mounted on a carriage 92. The carriage is power-driven, as usual, and has a rack 97 meshing with a pinion86, connected with an escapenient wheel 85, the latter controlled by dogs 84,

operated by :L iiniversal bar 83, which is actuated by the type bars` so that whenever any type key'is actuated, the carriage 92 is caused to feed a letter space.

Fast-ened at the back of the carriage 92, are brackets 93, carrying a rack 94, to receive adjustable cams or tappets 95 which het asdenomination selectors. Whenever any tappet, during the travel'of the carriage, ,passes beneath the set of jacks 96, it raises the forward ends ot' the jacks in succession,

turning each on its pivot 9T, and i'iepressing its rear end te press down the corresponliiing one of a set of wires 98. These wires are connected at their lower ends to levers 99 on a fulerum rod 100.

Each lever 99 raises one of a set of 1inkages 101, eah linkage lhaving a pin 102 to lift the rear end of a rack 103, the forward end oli-which meshes with a pinion 104 connected to a computing wheel 105. Each rack carries a set of pins 106, and one of these is depressed by the operated type key 88; each key having a stem 110, for this purpose, to depress a crank 112, fast to a s haft 113, which is connected to a linkage 114, to depress one of the pins 106 upon the lifted rack bar 103 ,there bein one linkage 114 for each key, each linkage ing in position to depress a. corres ending pin 106 on whichever rack bar is li ted, as set forth in the above mentionedpending applications. Afterfthe keys 88 are manipulated to write a. number,

and thecorrespo'nding racks 103 accordingly ments to their racks 103, thereby turning the computing wheels 105 accordingly; the return .movements of the racks not turnin said wheels, however, because of a paw and-ratchet connection (not shown) between said wheels and their drive pinions 104. Pinions 116 meshing with racks 13, are also in mesh with` segments 116 fixed on rock-shaft 116.

Up to this time I havedescribed how the connection of the electro-motive means, shown in the form of an electric motor, to the operator may be manuall controlled. As has been stated above, itis ighly desirable to control the same automaticall to avoid the omission. of the operation rthe same. For this purpose, means may be utilized to connect the electromotive means with the operator by the conjunctive action, both combined and coperative of the keys and carriage, and certam'parts of the computing' mechanism. 'In this instance, there' shown as being slidingly and pivotally supported by a bracket 125 bypassing through an opening therein, but any other means maybe used for this purpose'.

The forward end of the interponent 123 130 give corresponding, forward endwise moveion ' that inwhichaigurewill be struck in the action of 'the imprinting or recording mech' the work sheet carrying' carriageand inot'orin drivin lfngifmecliamsm t rough theinterniediary of is seen to extend through the loop 126 forming a pin and slot connection with a. bell crank lever 127, ofwhich the loop 126 forms one arm. It will be seen that the bell crank lever- 127 'ma be operated from the interponent 123 w en the latter is actuated b the universal bar 83 through ,the interme iary of a lug 128 on the interponent 123 shown in the formof adjustable nuts having a screw-thread connected with the interponent 123 whereby theeil'ective throw ofthe bell crank may be varied. Another arm of the bell crank 127, indicatedat 129, may be vopratively connected to a lever 130, pivoted .at 13-1, by means of a link 132. It will be seen that the forward end of the lever 130 rests on the key 42so as to actuate the same. A spring 133 may be used, if desired, to return the 'linksl and levers together with .the interponent, back to their original ineiective position. It is t'o be understood that the interponent 123 might be more directly' con- ,nected to the controlling mechanism of the connection between the electric motor and the o erator 13. However, -the'mechanism just escribed is sutlicientto illustrate the spirit of this invention..

It will be seen that when one of the .numeral keys is struck, at a time when thecarriage occup units'colunin, the units jack will have been raisedfat its forward end through the lintermedary o f the cari-ia tappet or cam whereby the-rear end' o the units jack will have been lowered "a suicient distance to 't the interponent 123 to fall in juxtaposition to the universal bar 83 whereby the movement of said universal bar will atuate "i Said interpltft und ths through the'ntermdia'l'y 0f the bell crank lev'er 127, the key 4 2, a`nd the connected mechanism, throw the o eratorl'into operative connection with t e'motorl 1 Lthroughv the clutching mechliSlD, whereby sai operatorwill be recilproated so las to carry4 the numerals on t e computing m' previously set computing mechanism above described.

In 'otherfwords it maybe said thatv the 4anisin, certain parts ofthe' computing mechanism inufst be conjunctive and ata time corre- Spondinhg to the. imprinting a d setting up of. the gure in the units Acol-nin, in order itc cause the actuation' of the computin A.meohanisiin to add or subtract the numera written, by connecting the electro-moshown in the form of an electric relation with the computhe clutching"mechanism.' Thismean's that insuchoperation as tabulating, the general ies. a position corresponding to echanism which have been up by certain -partsofthe the numeral keys, upon special key.

nism, actuating means for said computing mechanism, connections between said actuating means land said computing mechanism normally ineffective, an operating key for making said connections effective, andmeans acting as an intermediary between said numeral keys and said operating key whereby -said operating key can be controlled by said numeral keys.

2.- In a combined -typewriting and' computing machine, the combination with a plurality of numeral keys, ofcomputing mecha# nism, actuating means for said computing mechanism, normally ine'ective connections between said actuating means and said computing mechanism, an operating key for controlling said connections, acarriage, and means v'acting as an intermediarybetween said numeral keys and said operating key,

whereby said operating key can be controlled from said numeral keys, said last-mentioned means being normally broughtinto effective positionby the moveineffective' and ment of said carriage to a predetermined point in its travel.

3. The combination with a computingmechanism, of numeral' keys foractuating said computing mechanism, a manually operable special key for inciting certain parts of said computing mechanism to action, a typewriter carriage, type bars actuated by said keys to coperate with -said carriage, and means dependent on the-conjunctive action of one ofv said numeral keys and said carriage to operate said special key.

4. In' a combined typewriting and computing machine,the combination with computf ing mechanism, of a typewriter'carriage, numeral .keys for controllingsaid carriage and for setting up 'numbers in-fsaid computing mechanism, driving means for said coin-4 puting'ni'echanism, aspecial-key or'determining the operation of said driving means,

and automatic `meai is for enabling any of setting .up digits in units place'in 'a number', to operate said 5. The combination with a traveling carriage, computing mechanism, and numeral keys, of driving means'for saidl computingmechanism, a special key for starting said driving means, and automatic means under the joint control of said carriage and said numeral keys for operating .said starting vao key; said automatic means including n interponent between saidY carriage an( said numeral keys and actuated. by the latter,

and connections between said interponent and said-starting key.

6. The combination 'with a traveling carringe, computing mechanism, and numeral keys, of driving means for said computin mechanism, a special key for starting sai driving means, and automatic means under the joint control of said carriage and' said numeral keys. for operating said starting key; said automat-ic means including an interponent between said carriage and said numeral keys which isf'opc'ated by the latter and is normally' ineffective with relation thereto, but is rendered effective by said car ringe, and connections between said interponent and said startingr key.

.7. The combination with' a traveling carriage, computing mechanism, and numeral keys, of driving means for said computing mechanism, a special key for starting said driving means, and automatic means under the joint control of said carriage and said numeral keys for operating said starting key; saidv automatic means including an interponent between said carriage and said numeral keys and actuated by the latter, a lever bearing upon said starting key, and

connections between said interponent and said lcverfor operating said lever.

8. The combination with a trfrveling carriage` computing mechanism, and numeral mechanism, a special key for-starting sai driving means operable `manually at any point in the traverseof the carriag'ea .nd automatic means for operating said-starting key at a predetermined point m the traverse ofthe carriage; said automatic means mclu ding an interponent between said carria and said .numeral keys andI actuated by tg i .Y latter, and connections between saidinterg poncnt and said startingkey.- 

